Kaleidoscope

Polar mirror folding over a drifting field

A radial rosette: one wedge of a drifting field mirrored around the centre into a symmetric flower of colour and rings. The pattern breathes and turns slowly. Segment count changes the character completely.

Rendering cost: medium. A few dozen samples per pixel: comfortable fullscreen on a discrete GPU, but cap the pixel ratio for a retina hero. How to tune it

Take Kaleidoscope with you.

Kaleidoscope is free. Sign in and it is yours — the background itself, with your settings already saved in, ready to drop into your site. The account is only somewhere to put the files. No card now, and no card later.

The other 61 come with a licence, $9.99 once.

$0forever

Your preset is in the URL. It survives the trip.